<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item :to="{ path: '/goods' }">商品列表</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert title="消息提示的文案" type="info" center show-icon :closable="false"></el-alert>
      <el-steps :space="200" :active="activeName - '0'" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeName"
          :before-leave="beforeTabsLeave"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格(元)" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number" :min="0.1"></el-input>
            </el-form-item>
            <el-form-item label="商品数量(个)" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number" :min="1"></el-input>
            </el-form-item>
            <el-form-item label="商品重量(克)" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number" :min="1"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="CascaderProps"
                @change="CascaderChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for=" item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="an" v-for="(an,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for=" item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="uploadHeaders"
              :on-success="uploadSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器添加图片的时候后台报错：(Payload Too Large)
                在app.js文件中添加如下代码：
              var bodyParser = require('body-parser')
              app.use(bodyParser.json({limit:'50mb'}));
              app.use(bodyParser.urlencoded({limit:'50mb',extended:true})); 

            出处：https://blog.csdn.net/weixin_40772969/article/details/86590047
            -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" @click="addGoods" class="addBtn">确 定</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="30%">
      <img :src="previewUrl" width="100%" />
    </el-dialog>
  </div>
</template>
<script>
import _ from "lodash";

export default {
  data() {
    return {
      activeName: "0",
      addForm: {
        goods_name: "",
        goods_weight: 0,
        goods_price: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: "",
        attrs: []
      },
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: "商品名称不能为空",
            trigger: "blur"
          }
        ],
        goods_price: [
          {
            required: true,
            message: "商品价格不能为空",
            trigger: "blur"
          }
        ],
        goods_weight: [
          {
            required: true,
            message: "商品重量不能为空",
            trigger: "blur"
          }
        ],
        goods_number: [
          {
            required: true,
            message: "商品数量不能为空",
            trigger: "blur"
          }
        ],
        goods_cat: [
          {
            required: true,
            message: "请选择商品分类",
            trigger: "blur"
          }
        ]
      },
      cateList: [],
      CascaderProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      manyTableData: [],
      onlyTableData: [],
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      uploadHeaders: {
        Authorization: window.sessionStorage.getItem("token")
      },
      previewUrl: "",
      previewVisible: false
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    goHome() {
      this.$router.push("/goods");
    },
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      } else {
        this.cateList = res.data;
      }
    },
    CascaderChange() {
      console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      } else {
      }
    },
    beforeTabsLeave(activeName, oldActiveName) {
      console.log(this.addForm);

      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请选择商品分类！");
        return false;
      } else {
      }
    },
    //单击标签触发事件
    async tabClick() {
      if (this.activeName === "1" || this.activeName === "2") {
        let str = "";
        if (this.activeName === "1") {
          str = "many";
        } else {
          str = "only";
        }
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: str }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg);
        } else {
          if (this.activeName === "1") {
            res.data.forEach(item => {
              item.attr_vals = item.attr_vals ? item.attr_vals.split(",") : [];
            });
            this.manyTableData = res.data;
          } else {
            this.onlyTableData = res.data;
          }
        }
      } else {
      }
    },
    //单击图片触发事件
    handlePreview(file) {
      this.previewUrl = file.response.data.url;
      this.previewVisible = true;
    },
    //点击移除图片触发事件
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex(x => {
        x.pic = filePath;
      });
      this.addForm.pics.splice(i, 1);
    },
    //上传图片成功触发事件
    uploadSuccess(res) {
      console.log(res);
      const picUrl = { pic: res.data.tmp_path };
      this.addForm.pics.push(picUrl);
    },
    addGoods() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项！");
        } else {
          this.addForm.goods_cat = this.addForm.goods_cat.join(",");
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(",")
            };
            this.addForm.attrs.push(newInfo);
          });
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals
            };
            this.addForm.attrs.push(newInfo);
          });
          const { data: res } = await this.$http.post("goods", this.addForm);
          if (res.meta.status !== 201) {
            this.addForm.goods_cat = this.addForm.goods_cat
              ? this.addForm.goods_cat.split(",")
              : [];
            return this.$message.error(res.meta.msg);
          } else {
            this.$message.success(res.meta.msg);
            this.$router.push("/goods");
          }
        }
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length !== 3) {
        return null;
      } else {
        return this.addForm.goods_cat[2];
      }
    }
  }
};
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.addBtn {
  margin-top: 15px;
}
</style>